* {
    margin: 0;
    padding: 0;
}

.banner {
    overflow: hidden;
    width: 721px;
    height: 455px;
    border: 1px solid #eee;
    background-color: transparent;
    margin: 50px auto 0;

    position: relative;
}

.arrow-l, .arrow-r {
    z-index: 99;
    display: none;
    padding: 5px 15px;
    background-color: rgba(0, 0, 0, .5);

    position: absolute;
    top: 50%;
    transform: translateY(-50%);
}

.arrow-l>img, .arrow-r>img {
    width: 24px;
    height: 40px;
}

.arrow-l {
    left: 0;
}

.arrow-r {
    right: 0;
}

.img-box {
    list-style: none;
    display: flex;
    position: absolute;
    top: 0;
    left: 0;
}

.circle {
    list-style: none;
    display: flex;

    position: absolute;
    bottom: 20px;
    left: 50px;
}

.circle>li {
    width: 10px;
    height: 10px;
    margin: 0 5px;
    border-radius: 50%;
    background: white;
}

.current {
    background: red !important;
}
